1. Like a diamond; made or set with diamond. See Adamant.

2. The hardest, most brilliant, and most valuable of all the precious stones, being a crystal of pure carbon, and when very transparent said to be of the first water, and of the second or third water as the transparency decreases; the smallest type in general use; a rhomboidal figure.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• deamand,
• diamone,
• deamonds,
• dimand,
• dezmond,
• diamand,
• deamnd,
• diomond,
• dimonds,
• diamont,
• dimaond,
• demond,
• diemon,
• amond,
• diamon,
• dimiond,
• deamond,
• diamons,
• doamond,
• diemond

• Dyamond,
• santos-dumont,
• dementi,
• taument,
• supply-and-demand,
• deaminate,
• Temanite,
• Diamanda,
• diamante,
• TYMNET,
• in-demand,
• diamond-encrusted,
• demonoid,
• diamond-tipped,
• damned,
• Damonte,
• douaumont,
• DIMND,
• diamond-studded,
• demont,
• demonata,
• thomond,
• four-diamond,
• video-on-demand,
• Diamond-shaped,
• diomignite,
• demnat,
• god-damned,
• DOMINT,
• Tomnoddy,
• tamandu,
• Dement,
• Demond,
• demanned,
• rough-diamond,
• demand-management,
• diamagnet,
• timante,
• demento,
• damond,
• Damont,
• Damayanti,
• diamond-like,
• manufacture-on-demand,
• demint,
• print-on-demand,
• dyment,
• Demount,
• diamant,
• D'Amante,
• diamanté,
• double-damned,
• daomanite,
• tiemannite,
• tamandua,
• demande,
• be-damned,
• Demanda,
• Diminute,
• demand-loan,
• towmont,
• diamonte,
• demand-reduction,
• Rose-diamond,
• Demeaned,
• tyuyamunite,
• Tomenta,
• dumond,
• supply-demand,
• diamanti,
• damnatio,
• DIMUND,
• demand,
• Diamond-back,
• high-demand,
• demined,
• dimant,
• démenti,
• Dymond,
• Daimond,
• Damhnait,
• DIAMOND-MI,
• DAmante,
• DMONT,
• Diamanta,
• pre-dominate,
• Demonte,
• dymondia,
• Bristol-diamond,
• PENT-UP-DEMAND,
• demant,
• TMNT,
• diminuta,
• damnit,
• demand-driven,
• Dumont,
• timewindow,
• towmond,
• demand-side,
• dominate,
• demonhood,
• Daymond,
• on-demand,
• Timnite,
• black-diamond,
• daemonite,
• five-diamond,
• music-on-demand,
• diammoniate,
• dimond,
• diament,
• DAMANET.

The adjective form of the word "diamond" would be "diamond," as it can function as both a noun and an adjective. For example, you could say "a diamond ring" or "a diamond necklace" to describe jewelry made with diamonds.

The plural of the "diamond" can be the "diamonds".

The singular of the "diamond" can be the "diamond".